1; RUN: opt -basicaa -loop-distribute -loop-vectorize -force-vector-width=4 \ 2; RUN: -verify-loop-info -verify-dom-info -S < %s | FileCheck %s 3 4; If only A and B can alias here, we don't need memchecks to distribute since 5; A and B are in the same partition. This used to cause a crash in the 6; memcheck generation. 7; 8; for (i = 0; i < n; i++) { 9; A[i + 1] = A[i] * B[i]; 10; ------------------------------ 11; C[i] = D[i] * E[i]; 12; } 13 14target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 15target triple = "x86_64-apple-macosx10.10.0" 16 17define void @f(i32* %a, 18 i32* %b, 19 i32* noalias %c, 20 i32* noalias %d, 21 i32* noalias %e) { 22entry: 23 br label %for.body 24 25; CHECK-NOT: memcheck: 26; CHECK: mul <4 x i32> 27 28for.body: ; preds = %for.body, %entry 29 %ind = phi i64 [ 0, %entry ], [ %add, %for.body ] 30 31 %arrayidxA = getelementptr inbounds i32, i32* %a, i64 %ind 32 %loadA = load i32, i32* %arrayidxA, align 4 33 34 %arrayidxB = getelementptr inbounds i32, i32* %b, i64 %ind 35 %loadB = load i32, i32* %arrayidxB, align 4 36 37 %mulA = mul i32 %loadB, %loadA 38 39 %add = add nuw nsw i64 %ind, 1 40 %arrayidxA_plus_4 = getelementptr inbounds i32, i32* %a, i64 %add 41 store i32 %mulA, i32* %arrayidxA_plus_4, align 4 42 43 %arrayidxD = getelementptr inbounds i32, i32* %d, i64 %ind 44 %loadD = load i32, i32* %arrayidxD, align 4 45 46 %arrayidxE = getelementptr inbounds i32, i32* %e, i64 %ind 47 %loadE = load i32, i32* %arrayidxE, align 4 48 49 %mulC = mul i32 %loadD, %loadE 50 51 %arrayidxC = getelementptr inbounds i32, i32* %c, i64 %ind 52 store i32 %mulC, i32* %arrayidxC, align 4 53 54 %exitcond = icmp eq i64 %add, 20 55 br i1 %exitcond, label %for.end, label %for.body 56 57for.end: ; preds = %for.body 58 ret void 59} 60